Rules Question on a Punt Play

[Sturdy6]

Quick question on a scrimmage kick play. 4/10 @ A-30. B1 makes a fair catch at the B-30. A45 is flagged for holding before the kick, and
B52 clips at the B-40 during the kick. What are the options?

[Legacy Zebra]

All of the criteria for post scrimmage kick enforcement are met (Team B’s foul was during the kick, the kick crossed the neutral zone, Team B will next put the ball in play, not a successful try, in OT or on a try). So Team A’s foul is treated as if it happened after the change of team possession. That means Team B has the option. They can choose offsetting fouls and replay the down, or they can decline the penalty for Team A’s foul and retain possession after completion of the penalty for their foul. The basic spot for this foul is the PSK spot. The PSK spot for this down is the spot where the fair catch was made. So the basic spot is the B-30 and the spot of the foul is the B-40. Because the basic spot is behind the spot of the foul, the penalty is enforced from the basic spot. The 15 yard penalty for clipping would make it Team B’s Ball, 1/10 @ B-15. Regardless of what Team B chooses, the play clock is at 25 and the game clock starts on the snap.

[ElvisLives]

Quick question on a scrimmage kick play. 4/10 @ A-30. B1 makes a fair catch at the B-30. A45 is flagged for holding before the kick, and
B52 clips at the B-40 during the kick. What are the options?

A, 4/10, A-30, snap (25), or

10-1-4 Exception 1
B, 1/10, B-15, snap (25)

This is known as the "clean hands" exception. Normally, live-ball fouls by both teams during a down become offsetting fouls, and the down is repeated at the previous spot. However, in this case, Team B had not fouled BEFORE gaining possession (their "hands were clean"); therefore, Team B MAY invoke this rule and refuse offsetting fouls. By doing so, they decline the penalty for Team A's foul, and then Team A has the option to accept or decline the penalty for Team B's foul. Then, the next down is played from the spot where Team B's penalty leaves the ball, with Team B snapping (in this case, following PSK enforcement). (Note: That down could be in an extended period, if time in the 2nd/4th period expired during the previous down.)
I have seen teams elect to accept offsetting fouls, to have the down repeated (for field position or scoring attempt purposes), but those are unusual, if not rare.
While there are technical scenarios where Team A might decline Team B's penalty (after Team B invokes the 'clean hands' exception), they are extremely rare, and I won't get into them, here.